Transactions of Materials and Heat Treatment

Title：Analysis on hot forging defects of aluminum alloy automobile brackets and mould optimization

Authors： Lyu Hongyi Gong Hongying Miao Jun Zhang Jie

Unit： Shanghai University of Engineering Science

KeyWords： aluminum alloy 6061 automobile engine bracket hot forging defects mould optimization Deform-3D

ClassificationCode：TG319

year,vol(issue):pagenumber：2018,43(1):117-123

Abstract：

In order to eliminate defects of folding, insufficient filling, peeling, skin peel off produced in the hot forging process of aluminum alloy automobile engine brackets, the hot forging process of aluminum alloy 6061 for automobile brackets was numerically simulated by Deform-3D, and the reasons of defects were disturbances of metal flow lines, unsteady metal flow rates and multiple metal confluence at corners during the pre-forging process. According to the above reasons of defects, three kinds of molud optimization schemes were proposed and simulated separately, and the forging defects, metal filling effect and forging load were compared. The results show that the forming results of scheme 2 and scheme 3 are both good. However, compared with scheme 2, scheme 3 does not need to change the pre-forging mould to reduce the processing cost, and the forging load of scheme 3 is 1970 kN less than that of scheme 2. Therefore, scheme 3 is regarded as the best. Furthermore, the small batch production was produced on the press, and the production results and simulation results were consistent.

Funds：

2017年上海市研究生课程建设项目(A1-8944-17-0303)；“基于材料科学与工程一级学科的研究生课程建设”校企合作项目（157CL-027；177CL-001)

作者简介：吕弘毅（1989-），男，硕士研究生，E-mail：lvhongyi89@sina.com；通讯作者：龚红英（1974-），女，工学博士，硕士生导师,教授，E-mail：ghyyw1974@163.com

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